CN107139916A - Operator torque demands' analytic method for hybrid vehicle - Google Patents
Operator torque demands' analytic method for hybrid vehicle Download PDFInfo
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- CN107139916A CN107139916A CN201710347208.4A CN201710347208A CN107139916A CN 107139916 A CN107139916 A CN 107139916A CN 201710347208 A CN201710347208 A CN 201710347208A CN 107139916 A CN107139916 A CN 107139916A
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- torque
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
Abstract
The present invention relates to a kind of operator torque demands' analytic method for hybrid vehicle, the hybrid vehicle includes engine, motor, speed changer, high-tension battery assembly part, and operator torque demands' analytic method includes：Dynamical system torque capability computational methods, based on engine current torque ability, motor current torque ability, power train gearratio, the corresponding transmission loss of current drive ratio, driveline torque capacity, the maximum drive torque that power source is applied to driving wheel end is calculated；Operator torque demands' analytic method, based on the maximum exportable moment of torsion of dynamical system, accelerator pedal aperture and speed information, parsing current power system output torque is calculated, when accelerator pedal aperture is maximum, torque demand and the maximum exportable moment of torsion of dynamical system are same.
Description
Technical field
The present invention relates to the operator torque demands' analytic method controlled for hybrid power automobile power system, belong to electricity
Electrical automobile full-vehicle control field.
Background technology
At present, orthodox car operator torque demands parsing not with conventional internal combustion engine vehicle and hybrid power
The method parsing operator torque demands of both vehicles compatibility.Being based on starting traditional operator demand's moment of torsion analytic method more
Machine flywheel end parses operator torque demands, and the real expection of driver should be embodied in the driving force at wheel end, traditional solution
Analysis method does not recognize that driver inputs in the way of meeting driver's expected standard, while dynamical system torque capability is in difference
Change under environment is not taken into full account.
And dynamical system torque capability is as environment is continually changing, when vehicle environmental temperature is relatively low or vehicle is in height
During former environment, engine torque ability can be reduced, and ultimately result in the reduction of dynamical system torque capability.Particularly hybrid power vapour
Car, when battery temperature exceeds working range or battery electric quantity wretched insufficiency, motor of hybrid power automobile power output can be big
Big reduction, ultimately results in the reduction of dynamical system torque capability.When temperature of transmission is too high, driveline torque capacity will also drop
It is low, ultimately result in the reduction of dynamical system torque capability.
If operator torque demands' parsing does not consider dynamical system torque capability, when operator demand's moment of torsion exceeds power
After system torque ability, when accelerator pedal continues to increase but vehicle power does not increase therewith, vehicle performance and driver intention
It is not inconsistent.Therefore need to take into full account dynamical system torque capability when parsing operator torque demands, this is for hybrid electric vehicle
It is particularly important.
The content of the invention
Problems to be solved by the invention
The present invention provides a kind of hybrid vehicle operator torque demands analytic method, it is characterised in that based on driving wheel
End carries out moment of torsion parsing, compared with traditional vehicle is based on engine flywheel end progress moment of torsion parsing, more represents driver and truly expects,
Operator torque demands' parsing of different hybrid power configurations can be met simultaneously；Dynamical system torque capability is calculated in real time,
When dynamical system torque capability changes, it is ensured that operator torque demands' parsing follows accelerator pedal to change well.
Technical scheme is as follows
The invention provides a kind of operator torque demands' analytic method for hybrid vehicle, the hybrid power
Automobile includes engine, motor, speed changer, high-tension battery assembly part, operator torque demands' analytic method bag
Include：
Dynamical system torque capability computational methods, based on engine current torque ability, motor current torque ability, transmission
It is gearratio, the corresponding transmission loss of current drive ratio, driveline torque capacity, calculates power source and be applied to driving wheel end most
Big driving torque；
Operator torque demands' analytic method, based on the maximum exportable moment of torsion of dynamical system, accelerator pedal aperture and speed
Information, calculates parsing current power system output torque, when accelerator pedal aperture is maximum, torque demand and dynamical system
Maximum exportable moment of torsion is same.
The dynamical system torque capability and operator torque demands' parsing are all based on driving wheel end, engine torque
Ability, motor torque capability and driveline torque capacity can all produce influence to dynamical system torque capability, and then influence to drive
Member's torque demand parsing.
Application engine water temperature calculates engine torque lossEngine charge pressure is used as correction factorEnter
Row engine current torque abilityCalculate, engine water temperature is lower, and engine current torque ability is smaller, and engine enters
Atmospheric pressure is lower, and engine current torque ability is smaller, and its computational methods is
The torque capability that the motor currently can be provided is not only related to electric system state, at the same with battery system shape
State strong correlation, i.e. battery current available power will determine motor current torque ability, using battery charge state correction factor
fsoc, cell health state correction factor fsoh, battery temperature correction factorMotor temperature correction factorTo calculating motor
Current torque ability, its computational methods is
The driveline torque capacityFor the transferable peak torque of power train, wherein driveline torque capacity by
The limitation (such as clutch, power transmission shaft, gear) of mechanical transmission component, it is defeated that driveline torque capacity will limit power source torque
Go out, its computational methods is
Wherein trqmaxFor the exportable peak torque of power source.
According to power train gearratio imaxEngine torque ability, motor torque capability are converted to road wheel end；While basis
Different hybrid power configurations and motor position, engine and the corresponding gearratio of motor can be differed.
The Driveline losses are the transmission loss moment of torsion trq that engine and Motor torque are delivered to road wheel endloss, with moving
The exportable peak torque trq in power sourcemaxIt is related to gear, it is that gained is tested based on power assembly test-bed, dynamical system is most
High pulling torque capacity calculation method is
Torque demand parsing, wherein dynamical system are carried out based on dynamical system torque capability, accelerator pedal aperture, speed information
Torque capability of uniting is the torque demand under 100% accelerator pedal aperture.
Hybrid vehicle operator torque analytic method of the present invention considers dynamical system torque capability not
With the otherness under environment, the moment of torsion person's of sailing torque demand is driven according to the adjustment of dynamical system torque capability.It is base to be related to torque demand
In driving wheel end, compared with the demand torque based on transmission input shaft, it is pre- that vehicle traction torque responsive can more meet driver
Phase driving force；When automobile dynamic system torque capability changes, the otherness of driving force under different accelerator pedal apertures can guarantee that.
The present invention has taken into full account dynamical system torque capability, after dynamical system torque capability is reduced, and is driven under maximum throttle aperture
Member's torque demand should match with dynamical system torque capability, and the operator torque demands under part-throttle aperture accordingly reduce,
Ensure under different accelerator open degrees, vehicle there are different performances.
Brief description of the drawings
Fig. 1 show exemplary hybrid powertrain system structural representation.
Fig. 2 show the application hybrid vehicle operator torque demands' analytic method flow chart.
Fig. 3 show the application hybrid vehicle operator torque demands' analytic method structured flowchart.
Description of reference numerals：
1 engine；2 separation clutches；3 motor；4 transmission input shafts；5 gearboxes；6 main reducing gears；100 dynamical systems
System torque capability computing module；200 dynamical system maximum drive torque computing modules；Operator torque demands' parsing module 300；
110 engine maximum work torque arithmetic modules；120 motor maximum torque computing modules；130 driveline torques limit module；140
Power train gear ratio calculation module；150 Driveline losses computing modules.
Embodiment
The invention provides a kind of hybrid vehicle operator torque demands analytic method, to solve existing dynamical system
In the case of torque capability changes, vehicle reality output moment of torsion and the unmatched problem of driver intention.
The invention discloses a kind of hybrid vehicle operator torque demands analytic method, the hybrid vehicle bag
The assembly part such as engine, motor, speed changer, high-tension battery is included, methods described is calculated including dynamical system torque capability
Method and operator torque demands' analytic method.
The dynamical system torque capability computational methods are to be based on engine current torque ability, motor current torque energy
Power, power train gearratio, Driveline losses and driveline torque capacity, calculate the maximum drive that power source is applied to driving wheel end
Dynamic torque, when engine current torque ability or motor torque capability reduction, dynamical system torque capability will be decreased.
Operator torque demands' analytic method is to be based on dynamical system torque capability, accelerator pedal aperture, speed information, calculates parsing and drives
Torque demand of the person of sailing at driving wheel end.
Engine current torque ability is related to engine water temperature, engine charge pressure.Work as engine cooling water temperature
When lower, engine friction torque is bigger, and engine torque ability is smaller, therefore application engine water temperature calculates engine torque
LossWhen engine charge pressure is lower, air input of engine by air is fewer, and engine torque ability diminishes, therefore adopts
Use admission pressure factor of influenceEngine torque ability is modified.
The factors such as the current peak torque ability of motor and motor body temperature, inverter temperature, battery available horsepower are related.
Motor body and inverter exceed in the case of working range, and the available peak power of the higher motor of temperature is smaller, therefore use
Motor temperature factor of influenceMotor torque capability is modified.Battery available horsepower and battery charge state, battery health
The factors such as state, battery temperature are related.Battery charge state is lower, and battery available horsepower is smaller；Cell health state is lower, electricity
Pond available horsepower is smaller；Battery temperature exceedes working range, and battery available horsepower diminishes, therefore using battery charge state influence
Factor fsoc, cell health state factor of influence fsoh, battery temperature factor of influenceBattery available horsepower is modified.
Driveline torque capacity is that power train allows the peak torque of transmission, and driveline torque capacity is by motor, engine
Mechanical transmission mechanism to driving wheel end influences.The moment of torsion of power-transmitting part (such as clutch but, speed changer, main reducing gear)
Transfer capacity influences whether that power source is applied to the maximum drive torque of road wheel end.
Driveline losses are the transmission loss that engine and Motor torque are delivered to road wheel end.Mainly include clutch, become
The transmission loss of the power-transmitting parts such as fast device, main reducing gear.Different gears, different gearbox oil temperatures, transmission moment of torsion etc. are all
Transmission loss will be influenceed.
Operator torque demands' analytic method is based on dynamical system torque capability, accelerator pedal position and speed letter
Breath, when accelerator pedal aperture is maximum, operator torque demands are equal to dynamical system peak torque ability, when acceleration is stepped on
When plate aperture is less than maximum, torque demand is less than dynamical system torque capability, increases with accelerator pedal aperture and increases.To answer
To the vehicle of different driving styles, operator torque demands are normalized, f is represented byp=F (P, Vspd), in formula
P represents gas pedal aperture, VspdRepresent speed.
Fig. 1 show exemplary hybrid powertrain system structural representation.The hybrid power system is made up of two power sources, the
One power source is engine 1, and the second power source is motor 3, wherein separation clutch 2 can be by engine 1 and power train point
From Motor torque is applied to driving wheel by gearbox 5, main reducing gear 6, realizes pure motor driving.Separation clutch 2 is engaged
When, engine torque and motor torque are applied to driving wheel by gearbox 5, main reducing gear 6, realize hybrid power.
Fig. 2 shows a kind of calculating stream of base hybrid vehicle operator torque demands' analytic method of the embodiment of the present application
Journey, comprises the following steps：
S1 calculates present engine peak torque ability according to engine water temperature, admission pressure, engine speed.
In implementation process, the maximum engine torque in the case where engine pedestal obtains standard stateAnd by recognizing present engine
Rotating speed, current admission pressure, present engine water temperature, according to admission pressure factor of influenceUnder the influence of engine water temperature
Engine torque losesCalculate the exportable peak torque of present engineCircular is
S2 calculates current motor maximum and turned round according to battery charge state, cell health state, battery temperature, motor temperature
Square ability.In implementation process, maximum motor moment of torsion under standard state is obtained by motor benchBy recognizing present battery
State-of-charge, cell health state, battery temperature, motor temperature, according to pond state-of-charge factor of influence fsoc, battery health shape
State factor of influence fsoh, battery temperature factor of influenceMotor temperature factor of influenceCalculate the exportable maximum of current motor
Moment of torsionCircular is
S3 is according to driveline torque ability, limitation power source output total torque.Maximum engine and motor total torque sum,
No more than the maximum transferable moment of torsion of contemporary transmissions system.Work as maximum engineWith motor total torqueSum is more than
The maximum transferable moment of torsion of contemporary transmissions system, should limit power source torque for contemporary transmissions system maximum delivered moment of torsionAnd think
The maximum exportable moment of torsion of current power source is contemporary transmissions system maximum delivered moment of torsionEngine and motor total torque sum
Less than contemporary transmissions system maximum delivered moment of torsion, power source total torque is not limited, and think the exportable peak torque of current power sourceFor maximum engine and motor total torque sum, circular is
S4 is according to current vehicle speed and the maximum exportable moment of torsion of power source, the corresponding dynamical system of the different gear gearratios of calculating
Unite output torque, and the gearratio corresponding to maximum power system output torque is used as calculates power train peak torque ability
Gearratio imax。
S5 is according to current power source peak torqueAnd gear, calculate driveline torque loss trqloss, practical application
In be by power train engine bench test obtain driveline torque lose.
S6 is according to current power source peak torqueGearratio imaxWith Driveline losses trqloss, calculate dynamical system
Max. output torque of uniting trqmax, circular is
S7 calculates current driver's and turned round according to the exportable peak torque of current power system, gas pedal aperture, speed
Square demand trqreq.Design under different accelerator open degrees, accelerator open degree P and the corresponding relation f of dynamical system max. output torquep.For
The vehicle of different driving styles is tackled, operator torque demands are normalized, f is represented byp=F (P, Vspd), formula
Middle P represents gas pedal aperture, VspdRepresent speed.Circular is trqreq=trqmax*fp。
Fig. 3 show a kind of structured flowchart of hybrid vehicle operator torque analytic method, including dynamical system is turned round
Square capacity calculation module 100, dynamical system maximum drive torque computing module 200 and operator torque demands' parsing module 300.
The dynamical system torque capability computing module includes：
Engine maximum work torque arithmetic module 110, according to present engine cooling water temperature, engine charge pressure,
Calculate the peak torque that engine can be output；
Motor maximum torque computing module 120, for according to current motor system mode, battery status, calculating current electricity
The peak torque of function output；
Driveline torque limits module 130, can be transmitted for according to contemporary transmissions system state, calculating contemporary transmissions system
Peak torque, and limit the total torque of power source；
Power train gear ratio calculation module 140, for according to the current vehicle speed and different gear gearratios, calculating and carrying
For the gearratio corresponding to maximum driving force；
Driveline losses computing module 150, is damaged for according to current shift, gearbox oil temperature, calculating current power system
The moment of torsion of mistake；
Dynamical system maximum drive torque computing module 200, for according to the exportable peak torque of current power source, biography
Dynamic is gearratio, driveline torque loss, calculates the exportable maximum driving force of current power system.
Operator torque demands' parsing module 300, for according to the exportable maximum driving force of current power system, current
Gas pedal aperture, speed information, parse current driver's torque demand.
Claims (8)
1. a kind of operator torque demands' analytic method for hybrid vehicle, the hybrid vehicle includes starting
Machine, motor, speed changer, high-tension battery assembly part, operator torque demands' analytic method include：
Dynamical system torque capability computational methods, are passed based on engine current torque ability, motor current torque ability, power train
Dynamic ratio, the corresponding transmission loss of current drive ratio, driveline torque capacity, calculate power source and are applied to the maximum of driving wheel end and drive
Dynamic torque；
Operator torque demands' analytic method, based on the maximum exportable moment of torsion of dynamical system, accelerator pedal aperture and speed information,
Parsing current power system output torque is calculated, when accelerator pedal aperture is maximum, torque demand is maximum with dynamical system
Exportable moment of torsion is same.
2. operator torque demands' analytic method according to claim 1 for hybrid vehicle, it is characterised in that
The dynamical system torque capability and operator torque demands' parsing are all based on driving wheel end, engine torque ability, electricity
Machine torque capability and driveline torque capacity can all produce influence to dynamical system torque capability, and then influence operator torque to need
Solve analysis.
3. operator torque demands' analytic method according to claim 1 for hybrid vehicle, it is characterised in that
Application engine water temperature calculates engine torque lossEngine charge pressure is used as correction factorCarry out engine
Current torque abilityCalculate, engine water temperature is lower, and engine current torque ability is smaller, and engine charge pressure is got over
Low, engine current torque ability is smaller, and its computational methods is
4. operator torque demands' analytic method according to claim 1 for hybrid vehicle, it is characterised in that
The torque capability that the motor currently can be provided is not only related to electric system state, at the same with the strong phase of battery system state
Close, i.e., battery current available power will determine motor current torque ability, using battery charge state correction factor fsoc, battery
Health status correction factor fsoh, battery temperature correction factorMotor temperature correction factorTo calculating motor current torque
Ability, its computational methods is
5. operator torque demands' analytic method according to claim 1 for hybrid vehicle, its feature
It is the driveline torque capacityFor the transferable peak torque of power train, wherein driveline torque capacity is by machine
The limitation of tool drive disk assembly, driveline torque capacity will limit power source torque output, and its computational methods isWherein trqmaxFor the exportable peak torque of power source.
6. operator torque demands' analytic method according to claim 1 for hybrid vehicle, it is characterised in that
According to power train gearratio imaxEngine torque ability, motor torque capability are converted to road wheel end；Simultaneously according to different mixing
Power configuration and motor position, engine and the corresponding gearratio of motor can be differed.
7. operator torque demands' analytic method according to claim 1 for hybrid vehicle, it is characterised in that
The Driveline losses are the transmission loss moment of torsion trq that engine and Motor torque are delivered to road wheel endloss, can be defeated with power source
The peak torque trq gone outmaxIt is related to gear, it is that gained, dynamical system peak torque energy are tested based on power assembly test-bed
Power calculating method is
8. operator torque demands' analytic method according to claim 1 for hybrid vehicle, it is characterised in that
Torque demand parsing, wherein dynamical system moment of torsion energy are carried out based on dynamical system torque capability, accelerator pedal aperture, speed information
Power is the torque demand under 100% accelerator pedal aperture.
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Cited By (7)
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| CN108533739A (en) * | 2018-03-27 | 2018-09-14 | 吉利汽车研究院（宁波）有限公司 | A kind of automatic block vehicle process for gear and device |
| CN110203191A (en) * | 2019-06-04 | 2019-09-06 | 同济大学 | A kind of torque recognition methods, system and the computer readable storage medium of hybrid vehicle accelerator pedal |
| CN110562240A (en) * | 2019-08-19 | 2019-12-13 | 中国第一汽车股份有限公司 | torque capacity calculation method for light hybrid power system |
| CN110984282A (en) * | 2019-12-20 | 2020-04-10 | 徐州徐工挖掘机械有限公司 | Excavator control method based on maximum available torque of engine |
| CN111976708A (en) * | 2019-05-24 | 2020-11-24 | 北京车和家信息技术有限公司 | Generator control method, device, vehicle and computer readable storage medium |
| CN113879175A (en) * | 2021-11-18 | 2022-01-04 | 浙江吉利控股集团有限公司 | Method for determining driving range of vehicle, terminal device and storage medium |
| WO2023151458A1 (en) * | 2022-02-11 | 2023-08-17 | 长城汽车股份有限公司 | Motor torque control method and apparatus, electronic device, and vehicle |
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| CN113879175A (en) * | 2021-11-18 | 2022-01-04 | 浙江吉利控股集团有限公司 | Method for determining driving range of vehicle, terminal device and storage medium |
| WO2023151458A1 (en) * | 2022-02-11 | 2023-08-17 | 长城汽车股份有限公司 | Motor torque control method and apparatus, electronic device, and vehicle |
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